JPH0787823A - Mower - Google Patents

Abstract

PURPOSE:To adjust reaping height from an operator's seat. CONSTITUTION:A boss 9 is fixed to a mower deck 5 and a longitudinal cylindrical shaft 11 is rotatably pivoted on the boss 9. An input pulley 22 is attached to the longitudinal cylindrical shaft 11, a longitudinal reaping shaft 8 is internally engaged with splines. Cams 13 and 14 for vertically adjusting and moving the longitudinal reaping shaft 8 are arranged and an adjusting cam 15 is connected to a handling tool 19 of an operating part by a lining wire 20 to provide a mower.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to mowers.

[0002]

2. Description of the Related Art Conventionally, a mower deck provided with a grounding wheel rotatably supports a vertically oriented cutting blade shaft, and a cutting blade is attached to the lower end of the vertical shaft to attach the grounding wheel to the mower deck. In contrast, it was attached so that the vertical position could be adjusted (for example, Japanese Utility Model Laid-Open No. 4-94931).

[0003]

In order to adjust the mowing height of the turf with the above structure, it is necessary to vertically adjust the four grounding wheels attached to the front, rear, left and right of the mower deck. Therefore, for example, in the case of the configuration described in Japanese Utility Model Laid-Open No. 4-94931, it is necessary to temporarily pull out the retaining pin fixing the grounding wheel and adjust the grounding wheel up and down to insert and fix the retaining pin. Then, the operation became troublesome. In addition, it is necessary to go to the mower deck from the control unit in order to perform the adjustment operation, which is time-consuming and inconvenient because the lawn mower cannot be stopped until the adjustment operation is performed. An object of the present invention is to provide a mower capable of performing a quick and easy operation by rationally selecting a cutting height adjustment target and providing an operation tool for operating the selection target.

[0004]

According to the characteristic construction of the present invention, a vertically oriented cylinder shaft rotatably driven by a mower deck provided with a grounding wheel is rotatably supported, and a cutting blade shaft is torqued to the vertically oriented cylinder shaft. The cutting blade is mounted so as to be transmittable and movable up and down, and the cutting blade is attached to the lower end of the cutting blade shaft, and an operating mechanism for vertically adjusting the cutting blade shaft is provided above the mower deck. Are related to each other, and the effects are as follows.

[0005]

In other words, when the operating tool provided in the manipulating portion is operated, the operating mechanism operates to vertically adjust the cutting blade axis, the height of the cutting blade with respect to the mower deck is changed, and the cutting height can be changed. Therefore, the operator can perform the operation in the control section, and can perform the adjustment operation only by operating the operation tool.

[0006]

As a result, the adjusting operation can be performed easily and even during the operation, and the operability for adjusting can be improved as compared with the prior art. Moreover, since the cutting blade shaft is supported by the vertically oriented cylindrical shaft and can rotate integrally with the vertically oriented cylindrical shaft, the bending load applied to the cutting blade shaft through the cutting blade is applied between the cutting blade shaft and the vertically oriented shaft. It will be responsible for strengthening the strength, and the cutting blade shaft is supported by the cylindrical shaft, which is long in the axial direction.
Rattling at each adjusting position of the cutting blade shaft that moves up and down is suppressed, and good rotation performance of the cutting blade can be obtained.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 5, the steering section 1 is arranged in the front part, the traveling drive section 2 is arranged from the middle part to the rear part, the driving part 3 is arranged in the rear part, and the front mower F is provided in front of the machine body. Make up machine.

The front mower F will be described. Ground wheels 6 are arranged on the front, rear, left and right of the mower deck 5 which also serves as a main body, which is attached to the machine body through the elevating link 4, and is configured to be movable. The cutting blade 7 of is installed.

The support structure will be described for one of them. As shown in FIG. 1, the mower deck 5 is configured in two stages, and the internal space of the lower deck 5A is used as a mowing space. Lower deck 5
The upper deck 5B is attached to the upper surface of A, and the cutting blade shaft 8 is attached to the upper deck 5B. Specifically, the support boss 9 is attached at a predetermined position, and the cylindrical shaft 11 is rotatably supported inside the support boss 9 via bearings 10 and 10 in the vertical direction. The cutting blade shaft 8 is inserted at the axial center position of the vertically oriented cylindrical shaft 11 in a state of vertically penetrating the cutting blade shaft 8.
And the cylinder shaft 11 are spline-coupled to each other so as to be capable of transmitting torque and vertically movable. The cutting blade 7 is provided at the lower end of the cutting blade shaft 8.

Next, the operating mechanism A for vertically moving the cutting blade shaft 8 will be described. As shown in FIG. 1, the cutting blade shaft 8
A cam mechanism as an operating mechanism A is provided at the upper end of the. This cam mechanism is provided with upper and lower cam bodies 13 and 14 which are arranged above and below and are non-rotatably supported or fixed to a transmission belt cover 12, which will be described later, and an intermediate cam body 15 is provided between them. Is loosely fitted on the cutting blade shaft 8 so as to be rotatable around the cutting blade shaft 8. A washer 16 is attached to the upper end of the cutting blade shaft 8 protruding from the upper cam body 13 by the bolt 1
7, the thrust bearing 18 is arranged below the washer 16, and the washer 16 is placed on the upper cam body 13 via the thrust bearing 18 to
The cutting blade shaft 8 is supported by. Then, one end of a linking wire 20 connected to the operation tool 19 provided in the control section 1 is attached to the intermediate cam body 15. This linking wire 20
The pulling operation rotates the intermediate cam body 15 around the axis of the cutting blade shaft 8 to move the cutting blade shaft 8 up and down together with the upper cam body 13. Incidentally, in the operating mechanism A, as shown in FIG. 2, a mechanism for returning the intermediate cam body 15 by merely pulling the intermediate cam body 15 with the linking wire 20 is not provided, but the cutting blade 7 When the blade rotates, the cutting blade 7 itself receives a downward force, so that the intermediate cam body 15 can be returned by this force. Therefore, when the cutting height is set low, when the cutting height adjusting lever 19A is set to a predetermined position, the linking wire 20 is loosened, but the linking wire 2 is rotated by the rotation of the cutting blade 7.
0 is drawn in and tension occurs, and the cutting blade 7 moves down to a predetermined position.
Reference numeral 24 in FIG. 1 is a guide mechanism that allows the upper cam body 13 to move up and down while preventing rotation, and 27 is a bellows-shaped rubber interposed between the cutting blade 7 and the lower end of the cylinder shaft 11. It is a cover. On the other hand, the operating tool 19 is a cutting height adjusting lever 19A.
And a ratchet mechanism 21 for positioning the cutting height adjusting lever 19A.
The cutting blade 7 can be moved downward by pushing the ratchet pawl 21A of No. 2 to the push button 19a provided on the cutting height adjusting lever 19A. When the cutting blade 7 is moved upward, the intermediate cam body 15 is rotated by simply rotating the cutting height adjusting lever 19A upward without operating the push button 19a, and the cutting blade shaft is rotated. Lift 8 and cutting blade 7.

As shown in FIG. 1, a pulley 22 for taking in power is fixed to the upper end of the cylinder shaft 11 with a key, and the cylinder shaft 11 is fixed.
The blower fan 23 is attached to the lower end of the cylindrical shaft 11 so that the blower fan 2 can be driven to rotate.
At 3, the grass clippings are sucked from the mowing space and conveyed toward the discharge port 5C at one end of the mower deck 5. As a result, the cutting blade 7 itself does not need to be provided with a rising portion 7A for windbreaking, which is indicated by a chain double-dashed line in FIG. 1, reducing wind noise and cutting grass cut by the cutting blade 7 into a mower deck. There is an effect that adhesion to the inner surface of No. 5 is prevented and cleaning for that is unnecessary.

[Other Embodiments] The operation mechanism A may be as follows. Figure 4
As shown in FIG. 3, an annular groove 8A is formed on the upper end of the cutting blade shaft 8, and a shift fork-shaped operation lever 25 is provided in the annular groove 8A.
By swinging at 9, the cutting blade shaft 8 can be directly adjusted up and down. This type of mower can be applied to a walking type lawn mower or the like in addition to the riding type.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a vertical movement structure of a cutting blade shaft.

FIG. 2 is a vertical cross-sectional side view showing a state in which the cutting blade shaft is raised from the state of FIG.

FIG. 3 is a plan view showing a mower deck.

FIG. 4 is a vertical sectional side view showing another embodiment corresponding to FIG.

FIG. 5 is a side view showing a riding type lawnmower.

[Explanation of symbols]

 5 mower deck 6 grounding wheel 7 cutting blade 8 cutting blade shaft 11 vertical cylinder shaft 19 operation tool A operation mechanism

Claims (1)

[Claims] 1. A vertically oriented cylinder shaft (11) rotatably driven by a mower deck (5) provided with a grounding wheel (6) is rotatably supported, and the vertically oriented cylinder shaft (11) is provided with a cutting blade shaft (11). 8)
Operation of adjusting the cutting blade shaft (8) above and below the mower deck (5) by attaching the cutting blade (7) to the lower end of the cutting blade shaft (8) by penetrating it so that the torque can be transmitted and moving up and down. A mower in which a mechanism (A) is provided and the operation mechanism (A) and the operation tool (19) of the control part are linked.